DATA TECHNOLOGY CORPORATION
===========================

   DTC5280DL

   +------------------------------------------------------------+
   +------------------------------------------------------------+

   Data bus: 16-bit, ISA

   Size: Full-length, full-height card

   Hard drives supported:  Two MFM ST506/412 drives

   Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB

   Sector Interleave: 2:1

<gopher://bitreich.org/I/th99/c/C-D/20070-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                  Function                   |   Location   |
   |---------------------------------------------+--------------|
   | 34-pin control cable connector-floppy drive |      J1      |
   |---------------------------------------------+--------------|
   | 34-pin data cable connector-hard drive      |      J2      |
   |---------------------------------------------+--------------|
   | 20-pin data cable connector-drive 0         |      J3      |
   |---------------------------------------------+--------------|
   | 20-pin data cable connector-drive 1         |      J4      |
   |---------------------------------------------+--------------|
   | 4-pin connector-drive active LED            |      J5      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Factory configured - do not    |   JP1    |    open    |
   |   | alter                          |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Port addresses are 1F0-1F7 and |   JP2    |    open    |
   |   | 3F2-3F7h                       |          |            |
   |---+--------------------------------+----------+------------|
   |   | Port addresses are 170-177 and |   JP2    |   closed   |
   |   | 372-377h                       |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Factory configured - do not    |   JP3    |    open    |
   |   | alter                          |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive precompensation   |   JP4    | pins 1 & 2 |
   |   | is scaled by data              |          |    open    |
   |   | rate:500khz=125ns,             |          |            |
   |   | 300KHz=208ns, 50KHz=250ns      |          |            |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive precompensation   |   JP4    | pins 1 & 2 |
   |   | is 125ns                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Drive 0 is a single speed      |   JP4    | pins 3 & 4 |
   |   | floppy drive                   |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Drive 0 is a dual speed floppy |   JP4    | pins 3 & 4 |
   |   | drive                          |          |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Drive 1 is a single speed      |   JP4    | pins 5 & 6 |
   |   | floppy drive                   |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Drive 1 is a dual speed floppy |   JP4    | pins 5 & 6 |
   |   | drive                          |          |    open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 FLOPPY DRIVE CONFIGURATION                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Floppy drive 0 uses standard   |   JP5    | pins 4 & 6 |
   |   | logic                          |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive 0 uses reverse    |   JP5    | pins 2 & 4 |
   |   | logic                          |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive 1 uses standard   |   JP5    | pins 3 & 5 |
   |   | logic                          |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive 1 uses reverse    |   JP5    | pins 1 & 3 |
   |   | logic                          |          |   closed   |
   +------------------------------------------------------------+